基于ANSYS/LS-DYNA的钢板混凝土墙冲击实验的有限元分析

运用经典的显式非线性动力分析软件ANSYS/LS-DYNA，分析了1/7.5缩尺飞机模型撞击钢板混凝土墙的冲击实验。选用两种不同的混凝土材料本构模型(Winfrith模型、CSCM模型)模拟混凝土的非线性破坏过程，将钢板混凝土墙的破坏模式以及飞机模型的残余速度等与实验结果进行了对比。结果表明，有限元分析结果与实验吻合较好，且Winfrith材料模型能够更好地模拟混凝土的大应变、高应变率的非线性性能，验证了钢板混凝土墙和飞机材料本构模型的选取以及整个分析方法的适用性和有效性。

FEM analysis of impact experiments with steel plated concrete walls based on ANSYS/LS-DYNA

The simulation analysis of the impact test of 1/7.5 scaled aircraft model impacting the steel plated concrete walls is carried out by using finite element code of ANSYS/LSDYNA. Two models of different material (i.e. Winfrith model and CSCM model) are used to simulate the concrete. The comparison analysis of damage profile of walls and residual velocity of aircraft engine between the simulation results and test results is presented. The results indicate that the damage modes of the impact simulations are in agreement with that of the experiment. Furthermore, Winfrith concrete model is better for simulating the nonlinear performance of concrete with big strain and high strain rate than CSCM concrete model. It is verified that not only the selection of the material constitutive models for the steel plated concrete wall and aircraft model but also the entire analysis process is appropriate and effective.